How to install DCO-8.1 on a UEFI-based systems (physical or virtual).

[DCIM_Support]

Hi all!

In continuation of the topic considered in the , I want to offer a practically verified solution. I.e., how to successfully install the DCO-8.1 on UEFI-based systems (physical or virtual). Moreover, the topic appeared a little unexpectedly and it has the right to exist: it's no secret that many modern servers/systems already contain NVMe SSD storage with a huge performance of the disk subsystem. And as we all know, the OS booting from such storage is only possible with the support UEFI.

1. Since DCO-8.1 is based on CentOS-7.3 (1611), you first need to download at least the Minimal bootable iso-image from the corresponding site in the Internet.
2. Secondly, for simplicity, you need to copy all the contents above the specified iso-image to a USB-flash drive with FAT32 (not NTFS) file system. It can be very easy to do, and under MS Windows, for example, using 7-zip program. You could certainly burn the above image on a CD/DVD media (in my example I did, virtually 😀. But I assume, that the usual physical server either contains only one CD/DVD drive, or does not contain it at all. And if the server contains a CD/DVD drive, it will be occupied by the installation image of DCO-8.1.
3. Further, we assume that the DCO-8.1 installation image is already connected to our UEFI-based server and in addition we also inserted a USB-flash drive with files from the CentOS-7.3 image. After that, we boot from the DCO-8.1 installation image in the usual way. By answering some initial questions, go to the INSTALLATION SUMMARY screen of the installer where we enter the INSTALLATION SOURCE section:
4. Next, you need to temporarily switch to the text console using the keys, for example, Ctrl+Alt+F2 and use the lsblk command to look at all the connected block devices (storages):
   
5. The screenshot above clearly shows that the 2.4G CD/DVD drive sr0 is an installation image of DCO-8.1, and the 7.7G CD/DVD drive sr1 is a DVD media with an additional CentOS-7.3 image (I used Everything image in its example). Of course, if we use a USB-flash drive, the block device name will be different, for obvious reasons.
6. Next, just create in root RAM file system, for example, the folder cdrom and mount it USB-flash drive with additional files. In my screenshot, I create and mount an additional CD/DVD drive in the above folder:
   
7. If done correctly, the USB-flash drive will be successfully mounted. Next you need to switch back to the graphical installer console using Ctrl+Alt+F7 to the section INSTALLATION SOURCE.
8. In the INSTALLATION SOURCE we just add a new repository with the files from the installation image of CentOS-7.3. An example is shown in the screenshot, where the important points are highlighted in red. Moreover, the name of the folder with additional files does not matter: I have this cdrom (in the beginning should always be the symbol / and select the protocol file:// ). The main thing is that the folder name exactly coincides with what we created in the text console in the previous steps. When finished, press the Done button:
   
9. In the SOFTWARE SELECTION section, you do not need to select anything, for example, as in the screenshot:
   
10. In the INSTALLATION DESTINATION section I highlighted the important points in red in the screenshot. I.e., we select the target disk and automatically configure the partitions. And do not forget to press Done:
    
11. If everything is done correctly, then after clicking Begin installation, the normal installation process of DCO-8.1 will begin, but on the UEFI-based system. That I did 😀.

As a proof I'll show a couple of screenshots, for example, here is the partitions table of the DCO-server with UEFI-partition:

And this is a screenshot of the status of the DCO-server from the same webmin-console with the normal status Running:

I hope this will be useful and as usual, questions are welcome.

(CID:118003183)

[DCIM_Support]

Thanks a lot spezialist. I will definitely try that in my next installation 😀. I believe it is just time matter before we are explicitly required to choose UEFI in our installation

(CID:118003285)

[DCIM_Support]

Hi Winnie Chau,

As I answered in the previous topic , DCO-8.1 can be installed on any server/system, if only it was possible to switch to the legacy BIOS mode. And here I wanted to show the case where this is not possible, either because the server's firmware configuration, or due to the use as a storage fast NVMe SSD drives.

Still new UEFI mode used very often, and it is necessary to be considered.

With respect.

(CID:118003358)

[DCIM_Support]

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